Shaker-screen.



Patented Apr. 23, |90I.

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SHAKER SCREEN.

(Application led Sep. 11, 1889.)

No. 672.696. Patented Apr. 23, |901'. F. W. BUND.

SHAKER SCREEN.

(Application led Sept. 11, 1899.)

2 Sheets-Sheet 42.

(un lionel.)

lATnNT Trice,

FREDERICK W. BOND, OF ST. LOUIS, MISSOURI.

SHAKER-SCREEN.

SPECIFICATION forming part of Letters Patent No. 672,696, dated April23, 1901..

Application filed September l 1, 1899. Serial No. 730,105. (No model.)

To a/ZZ whom it may concern:

Be it known that I, FREDERICK W. BOND, of the city of St. Louis, Stateof Missouri, have invented certain new and useful Improvements inShaker-Screens, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

My invention relates to shaker-screens; and it consists of the novelconstruction, combination, and arrangement of parts hereinafter shown,described, and claimed.

One object of this invention is to construct a device which is placed incommunication with the mine-chute for screening coal as it is deliveredfrom the chute.

Another obj ect is that by manipulating various doors forming part ofthe invention the coal can be assorted to various grades, or the coalmay be delivered into the car direct, making what vis termedthemine-run.

Figure 1 is a vertical sectional view of my complete invention, showingits construction and in the act of loading cars. Fig. 2 is a top planView of the same. Fig. 3 is a side elevation, with parts broken away, ofone of the pivotally-extending arms, showing its pivotal construction.Fig. 4 is an end view of my invention with a part in section. Fig. 5 isan enlarged detail vertical sectional view showing a portion of thescreen mechanism and chutes and the arrangement'of the eccentrics foroscillating the same. Fig. 6 is a detail vertical sectional view of thegate made use of in my invention, showing its construction. Fig. 7 isadetail side elevation of the eccentrics used in connection with myinvention. Fig. 8 is a top plan view of the same.

In the construction of the device as shown I provide asuitablefoundation 1, of concrete or analogous material, on which I mountfoundation-blocks 2, 3, and 4. Upon the foundation-blocks 3 and 4 Imounta framework 5, which consists of uprights 6, having mounted ontheir top a horizontal framework 7. The

uprights 6 are provided with cross-bars 8, on

which are pivotally mounted vertically-extending arms 9. Said arms 9 arepivoted at their bottom to angles lO,secured in any desirable manner tothe cross-bar 8. (See Fig. 4.) The vertically-extending arms 9, whichare pivotally mounted upon the cross-bars 8, are

lower surface and held in positipn by strips 16,

extending downwardly and secured to a chute 17 by means of angle-irons18. The chute 17 is provided with vertically-extending sides 19 ofsuitable height and extends the entire length of said screen and has itsend 20 formed at a downward angle, so arranged as to cornmunicate with alike chute 21. The end 22 of the screen mechanisms is closed to preventany coal from passing beyond the end of said mechanism, and the screen15 has its end 23 bent slightly downward, forming a space 24, throughwhich the coal is adapted to fall upon a like screen 25, formed in alike mechanism 26, a portion of which is located immediately under saidopening 24. A portion of the screen 25 and the mechanisms 26, as will beseen in Fig. 2, is of the same construction as the screen 15, which isfor the purpose of allowing the same-sized siftings of the coal to fallupon the chute 21 and move thereon to the opening 27. From that point tothe end 28 the screen is of a coarser construction, which will allowlarger-sized siftings to fall upon that portion of the chute 21. Thescreen 25 at its end 28 is also bent downwardly a suitable distance fromthe front end 29 of the mechanism, forming an opening 30 of suiicientsize for the coal to pass downwardly therethrough and fall upon an apron31, the construction of which will be hereinafter fully set forth.

The chute 21 is provided with two openings 27 and 32, which are closedby means of the hinged plates 33, mounted upon angles 34, secured to theunder side of the chute. (See Figs. 5 and 6.) The lower ends of theplates 33 are hingedly secured to the chute by means of strap-hinges 35.It will be observed by referring to Figs. 5 and 6 that the bottom of theIOO chute, at the point communicating with the free or open ends of thehinged plates, is of a greater thickness than the said plates, which isfor the purpose of allowing the coal to freely pass from said plateswhen they are closed, so as to prevent any coal from lodging against theends of said plates,thereby obstructing the free passage within saidchute. The hinges 35 are so arranged as to occupy a small spacewithin'said chute, and therefore will not cause any obstruction.

To the bottom of the chute, located at a point beneath the hinge 35, ismounted a support 36, which is fastened in any desirable Located uponthe shaft on each side of the screen mechanism are eccentrics 43, whichopcrate eccentric-shafts 44, having their ends pivotally secured toshafts 45, mounted to the.

under surface of the screen mechanism, two of said eccentricsoscillatory operating the screening mechanism 13 and two of saideccentrics oscillatory operating the mechanism 26. -The'arrangement ofthe'eccentrics upon the driving-shaft is such that when the engine isoperated the mechanism will oscillate the screening mechanism oneagainst the other, yet will not allow the inclined end 20 of the chute17 to come out of contact with the end of the chute 2l, thus at alltimes allowing tlle siftings'to pass from the chute 17 into the chute21. The screening mechanism is allowed to oscillate by thepivotally-extending arms 9 being pivoted at both ends, one end to theframework and the other to the screen mechanism.

The construction of the pivotally-extending arms 9 of the screenmechanism 26 is the same as that described in the mechanism 15.

The apron 31 is hingedly secured to the end of the chute 21 and isadjustably held at any desirable angle by the use of the arm 46, piv-[the car 48.

otally mounted to the bar 47, formed on the end of the screen mechanism26. By this device the apron 31 can be adjustably regulated and extendsbeyond the framework a suitable distance to allowthe coal. to beconveyed into (Shown in diagram in Fig. l.) The object of extending theapron 31 at such a length over the top of the car is for the purpose of.allowing the coal to fall within the body of the car at all times whilethe apron andv screen mechanism is in its oscillatory action, thuspreventing any of the coal from falling on the outside of the car-body.The entire device is arranged at suchheight as to allow cars to passunder the same, as shown in Fig. 1, and the arrangement of thepivotallyextending arms 9 is such that while in action they will not inany way interfere with the car-body. By the arrangement of the screens Imay assort the coal to any quality desired. This is done by simplyremovingthe screens and replacing the same with screens of larger orsmaller openings.

The operation is as follows: The top end of the screen mechanism13 isplaced in communication with the mine-chute. The engine is started andby the operation of its eccentrics the screen mechanism, together withthe vertically-extending arms, is reciprocated in opposite directions.The coal is allowed to pass upon top of the screen 15, and while thesame is in its oscillatory action it sifts the coal, allowing the slackor smallportions to fall upon the chute, 17, Ywhich is conveyed bythe.oscillatory action down over the inclined portion 2O and delivered uponthe chute 21. At the same time the larger particles of the coal areallowed to pass downwardly through the opening 24 onto the screen 25 andare conveyed by -its oscillatory action over the end 28 and deliveredupon the apron 31 down into the carbody 48. When the gates of the chutesare in the closed positions, as shown in Fig. 1, the slack and coal arefed direct into the carbody 48, making what is termed the minerun.Should it be desired to assort the coal in various sizes, I then openthe hinged plates 33 and allow the assorted coal to pass through theopenings 27 and 32. The slack, which is conveyed from the chute 17 ontothe chute 21, is passed through the gate-opening down upon the apron 37and delivered into the car-body IOO a., located under said opening, asshown in n Fig. 1.

The screen 25 at the point from the lower side of the opening 27 to itsopening 30 having larger reticulations than the screen 15 will allowlarger or coarser particlesof the coal to fall upon the chute 21, whichby means of the oscillatory action will convey the same through theopening 32, allowing the same to fall upon the apron and be conveyedinto the car-body b, which is located thereunder, while the largerparticles or lumps pass through the opening 30 onto the apron 31 andthence into the car 48. By this action I obtain three grades of coal,which are termed the slack, which Will beconveyed into the car a;nutooal, in the car b', and lump-coal, in the car 48. I may by a matterof construction arrange my invention so as toassort the coal in othersizes than the three mentioned, and as many more cars can be illed bythe same action and each be filled with a different grade of coal, andthis will be done by the mere arrangement 'of the sizes of thereticulations of the screens and an additional number of aprons andopenings formed in the chutes. Y

By this construction of the screen mechanism and chutes locatedthereunder the use of plates placed in the screen mechanism on the topof the screen in order to make what is termed a mine-run is entirelydispensed with, as in the devices now in use it is'necessary to placeplates upon the top of the IIO screen when such run is desired. This Iovercome by the placing of the chute under the screens, as described.

I claim- In a screening apparatus, an upper screen of uniform mesh and achute having its lower end bent downward, rigidly carried by saidscreen, in combination with a lower screen of graduated meshcommunicating with the firstmentioned screen, a chute formed withopenings in its bottom rigidly carried by said

